At the start Stewart went into the lead, ahead of Regazzoni, Fittipaldi and a fast-starting Hulme. Reutemann, Revson and Amon gave chase. Regazzoni immediately started having fuel-feed problems but managed to keep Fittipaldi behind him for four laps before losing second place by which time Stewart was three seconds clear at the front. Regazzoni pitted soon afterwards. Fittipaldi chased after Stewart and gradually closed the gap and so the two were running together. On lap 24 Fittipaldi took the lead. By that point Hulme had closed up to them and he was able to pass Stewart for second place on lap 27. Stewart continued to drop back down through the order, losing third to Peterson and fourth to Revson, soon afterwards Peterson ran into trouble with fuel feed problems and dropped away, leaving Revson in third place. The battle for the lead continued all the way to the flag but Fittipaldi was able to hold on to win by just over a second. The victory gave Fittipaldi a lead in the championship of 25 points with only three races remaining. Denny Hulme would need to win all three without Emerson scoring a point to beat the young Brazilian to the title.